Get Element from Object

I've got this

var fou = foubar.getContent();

where getContent is

Returns a jQuery object wrapping the dialog's content region - everything inside the frame, excluding the title bar.

Thing is there are textbox values inside of fou I'd like to 开发者_JAVA技巧get at. I've tried this below, but it doesn't work.

  fou.$('#textbox1').val();

How can I select elements of fou?

Try this: $('#textbox1',fou).val();

If fou really is a jQuery object, you can use find ^[docs]:

var value = fou.find('#textbox1').val();

if the textbox is a child element of fou you can do:

$(fou.children('#textbox1')).val();

Use find as shown below:

  fou.find( '#textbox1' );